I clearly remember that article. Adds another little fillip of “what the heck?” to the myth... They apparently didn’t have their story all worked out until later on.
Associates of Madelyn said they had no idea she had a grandchild until one day he showed up at the Bank. He used to come in after school and do his homework while waiting for her to finish work.
Oh dear, now I’ll have to look for that story as well, doesn’t anyone remember anything? Will I, won’t I? Is life too short or what?
Google is everyone’s friend, up to a point.